It was in the third hour of a bewildering odyssey into the iTunes rental wilderness (I and my crew were fiercely at arms with a six-foot DVI cable) when a quote I had read in the paper earlier that day came back to me with sudden, crystalline truthiness. It was in a brief New York Times piece recounting a staged talk between exmedia mogul Michael Eisner and polymath Mark Cuban at last weeks SXSW Interactive conference.